Guard and water-feed combination.



F. A. BRASSILL GUARD AND WATER FEED COMBINATION.

APPLICATION FILED MAH 8 Patent-ed Dec. 3, 1918.

Fig. 5

/ fill/111 vie g t t l (wenn Ann waren-:FEED COMBINATION.

Specification of Letters Patent.

Patented Dec. 3, 191.

Application led March 1918. Serial No. 221,120.

To all 'whom it may concer/n:

Be it known that 1, FRANK AnoisIoUs BnAssiLL, a citizen of the UnitedStates, residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and usefuil llmprovements inGuard and Water-Feed ,Combinations, of which the following is aspecification.

My invention relates to imprevementsin guard and water feed combinationssuitable for use on grinding machines of the typegenerally such as shownand described in the patent application filed by Oscar Werner Nilson andmyself on March 6, 1917, Serial No. 152,709, and allowed on date ofSeptember 25, 1917, and the object of my improve ment is simplicity andeconomy in construction and convenience and elliciency in use.

lln the acompanying drawing Figure 1 is a side elevation of the headportion of a grinding machine ofthe type referred to above that isequipped with my improved guard and water feed combination.

Fig. 2 is an end elevation of the same.

Fig. 3 `is an end elevation of the guard and Water feed combination withthe cover removed, showing the main part that -is mounted on the head ofthe grinding machine.

Fig. 4 is a sectional view of the main part on the line 4 4 of Fig. V1.

Fig. 5 is a sectional view on the line 5--5 of Fig. 2.

Fig. 6 is a fragmentary view, on an enlarged scale, of the delivery endportion and adjacent parts show-n in Fig. 2.

Fig. 7 is a side elevation of the same.

Fig. 8 is a 'sectional view on the line 8-8 of Fig. 7.

Fig. 9 is a sectional view on the line 9--9 of Fig. 6.

My improved guard and water feed combination comprises a shell-likestructure for inclosing the greater part of a grinding wheel 10, leavinga part of the wheel exposed to provide access thereto for the work,after the manner of guards in common use, and has a double-walledconstruction for the outer wall l1 so as to provide therein a channel 12that serves vasl a passage for the water that is used when the grindingmachine is used for wet grindin and is com` posed of a main part 13 that1s mounted on the head 14 of the grinder and a 4cover 15.

The main part `13 comprises a hub 16 that fits over and 1s mounted onthe end portion of the head 14, a web `portion 17 that extends radiallyfrom the outer end of the hub 16, and the outer `wall structure 11 thatis supported by the web portion 17 and ovcrhangs the grinding wheel 10.V

The cover 15 is generally plainA and closes the outer end of the mainpart 13.4

A water inlet 18 connects with some part of the water passage 12 and theflow-of whater is controlled by a cock 19 that is p0- sitioned in somepart of the said passage 12, and the delivery of water is eected througha nozzle 20 that is positioned at one end of the passage 12 and has atthe end a swinging spout 21 that can be adjusted in position relativelyto the grinding Wheel 10.

The main part 13 is made of a single casting and the cover 15 is securedthereto by a plurality of screws 22..

As shown, the water inlet 18 is post tioned at the rear of the main part13, connecting with about the middle portion of the water channel 12,the latter extending for substantially the entire length of the outerguard wall structure 11; the control valve or cock 19 is at the top,being operatively housed in a tapered seat 23 that extends across thepassage 12 and is extended outwardly`in a boss 24; the water passage 12being curved, concentric with the axis of the shaft 25 for the grindingwheel 10; and the delivery outlet 26 for the passage 12 is at the upperfront end, adjacent the cock 19, being directed as a tangentialcontinuation and extension of the water passage 12', the end portion 27being threaded to receive the nozzle 20.

The nozzle 20 is composed of the fixed body or nipple part 28 thatscrews into the threaded end portion 27 mentioned and has a longitudinalpassage 29 that initially is a direct extension of the outlet portion.26 of the passage 12 and which at the front end is continued generallydownwardly through a downwardly directed branch Or arm 30.

The' spout 21 is adjustably supported by :t pair of screws 31 and 32,that serve as pivots and' clamping members, and are positioned so thatthe axis for the movement of the spout 21 is at the junction 33 of theinterior being generally open, suitably to serve as a water deliverypassage in extension f the passages 12 and 29.v

The spout 21 has an opening- 34 at the upper, rear portion of theinclosing wall for admitting the nipple part 28 and has an opening 35that serves as the discharge outlet, and is positioned at `the rear sideof the lower -end portion, suitably to direct the water flow toward thefront portion of the grinding wheel 10 that is exposed through theopen'portionof the guard structure.

Thus the junction portion or head`33 of the nozzle 2O serves as thesupport for the spout 21, and means of support and adjustment of thesame are provided in the following manner The side walls 36 of the spout21 it against the sides of the head 33,.

and the twowalls 36 have alining apertures 37 and 38 for the screws`31and 32. The

aperture 37 in the le't wall 36', as shown in Fig. 9, is a lit ifor thebody of the left screw 31, and the aperture 38 in the right wall 36 isan operativelit for the thread of the right screw 32. The head 33 has onthe left side a threaded hole 39 that is an operative fit for the threadof the left screw 31 and has on the right side a conical depression 40that serves as a seat for the tapered end 41 of the right screw 32.

In locking the spout 21 to the position desired the left screw 31 isscrewed inwardly so that the head 42 thereof brings the left wall 36into bearing engagement with the head 33fso as to support the spout 21generally and then the right screw 32 is screwed inwardly so as to applya holding or lockingtension.

The structure, as described, is adapted to operate as a guard insubstantially th'e same manner as guards in lcommon use, and also, byreason of the double walled construction for the outer w-all, providesextra protection as a guard against4 the liability to injury from thebursting of the grinding wheel, and I utilize the open channel of thesaid double walled construction as the passage for the water feed forwet grinding.

Although, as shown,`only about the upper half of the channel 12 isactively used as the water passage, comprising the portion between theinlet 18 and the outlet 26, the lower portion, below the inlet 18, whichis closed at the lower, front end 42is filled with water when" in use,so that the entire channel 12 is filled with water and the watercontained therein is effective as a cooling medium that serves to coolthe guard structure directly and also indirectly, by conduction of heatalong the hub 16 and web 17, serves to cool the portion of the grindingmachine head 14 on which the hub 16 is mounted. The said portion of thegrinding machine head 43 serves as the housing for one of the bearingsfor the shaft 25, and

as the said shaft is operated at high speed the waterv feed, applied inthe manner described, operates to reduce the heating of the said bearingdue to such operation of the shaft.

I claim as my invention 1. A guard and water feed combination for usewith a grinding machine, comprising a shell-like structure for inclosinga grinding wheel and having a passage in the peripheral wall for thedelivery of a liquid cooling medium to the periphery of the saidgrinding wheel, the said peripheral Wall being extendedcircumferentially so as to cover the major portion of the saidperipheryv of the grinding wheel, and the said peripheral wall, forsubstantially the entire length thereof.l being in the form of adouble-walled structure, suitably to provide the said passage betweenthe two walls, and which passage is also extended circumferentially forthe housing of cooling medium Within the major portion of thecircumferential length of the said peripheral wall.

2..A lguard and water -feed combination for use with a vgrinding machineas decribed in claim 1, and having the delivery portion ofthe'saidpassage provided with a nozzle having an adjustable swinging spout foradjusting the direction of the delivery cooling medium relatively to theperiphery of the grin wheel.

FRANK ALOISIO S BRASSILL.

